lowest postseason era in mlb history with a minimum 20 innings pitched

John Rocker and Joe Niekro are tied for the lowest career ERA in the postseason when pitching at least 20 innings, with an ERA of 0.00.

Interpreted as:

lowest postseason era by a player in MLB history with a minimum 20 innings pitched

	NAME	ERA	IP	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	John Rocker J. Rocker	0.00	20.2	20	2	0	1.000	0	26	0	0	3	10	0	2	0	8	0	5	2	80	2	11.32	3.48	3.25	0.00	32.5	10.0	0.87	.217	0.87	4.35
2	Joe Niekro J. Niekro	0.00	20.0	3	0	0		2	7	0	0	0	14	0	0	0	5	2	0	1	82	0	3.15	2.25	1.40	0.00	8.5	6.1	0.95	.206	0.00	6.30
3	Dave Dravecky D. Dravecky	0.35	25.2	7	1	1	.500	2	24	1	1	0	12	1	1	0	5	0	1	0	88	0	8.42	1.75	4.80	0.00	27.3	5.7	0.66	.203	0.35	4.21
4	Chad Bradford C. Bradford	0.39	23.1	24	0	0		0	13	0	0	0	18	1	1	0	6	2	2	3	88	0	5.01	2.31	2.17	0.00	14.8	6.8	1.03	.269	0.39	6.94
5	Ken Dayley K. Dayley	0.44	20.2	16	1	0	1.000	0	15	0	0	5	6	1	1	1	6	1	8	0	72	0	6.53	2.61	2.50	0.44	20.8	8.3	0.58	.102	0.44	2.61
6	Mariano Rivera M. Rivera	0.70	141.0	96	8	1	.889	0	110	0	0	42	86	11	13	2	21	3	78	4	527	3	7.02	1.34	5.24	0.13	20.9	4.0	0.76	.215	0.83	5.49
7	Harry Brecheen H. Brecheen	0.83	32.2	7	4	1	.800	3	18	3	1	0	28	3	3	0	12	0	4	3	129	0	4.96	3.31	1.50	0.00	14.0	9.3	1.22	.283	0.83	7.71
8	Claude Osteen C. Osteen	0.86	21.0	3	1	2	.333	3	7	1	1	0	12	2	3	2	6	0	0	0	77	0	3.00	2.57	1.17	0.86	9.1	7.8	0.86	.161	1.29	5.14
9	Jeremy Affeldt J. Affeldt	0.86	31.1	33	2	0	1.000	0	20	0	0	0	14	3	3	1	8	2	4	2	111	2	5.74	2.30	2.50	0.29	18.0	7.2	0.70	.163	0.86	4.02
10	Babe Ruth B. Ruth	0.87	31.0	3	3	0	1.000	3	8	2	1	0	19	3	3	1	10	1	0	0	116	1	2.32	2.90	0.80	0.29	6.9	8.6	0.94	.188	0.87	5.52
11	Sherry Smith S. Smith	0.89	30.1	3	1	2	.333	3	5	3	0	0	17	3	4	0	9	0	0	1	110	0	1.48	2.67	0.56	0.00	4.5	8.2	0.86	.177	1.19	5.04
12	Andrew Miller A. Miller	0.93	38.2	29	2	1	.667	0	54	0	0	1	20	4	4	3	13	3	3	2	148	1	12.57	3.03	4.15	0.70	36.5	8.8	0.85	.227	0.93	4.66
13	Sandy Koufax S. Koufax	0.95	57.0	8	4	3	.571	7	61	4	2	0	36	6	10	2	11	0	0	1	213	0	9.63	1.74	5.55	0.32	28.6	5.2	0.82	.245	1.58	5.68
14	Steve Rogers S. Rogers	0.98	27.2	4	3	1	.750	3	11	2	1	0	24	3	3	2	4	0	1	1	105	1	3.58	1.30	2.75	0.65	10.5	3.8	1.01	.250	0.98	7.81
15	Jonathan Papelbon J. Papelbon	1.00	27.0	18	2	1	.667	0	23	0	0	7	14	3	3	0	8	0	12	3	100	0	7.67	2.67	2.88	0.00	23.0	8.0	0.81	.203	1.00	4.67
16	Hippo Vaughn H. Vaughn	1.00	27.0	3	1	2	.333	3	17	3	1	0	17	3	3	0	5	1	0	1	97	0	5.67	1.67	3.40	0.00	17.5	5.2	0.81	.230	1.00	5.67
17	Monte Pearson M. Pearson	1.01	35.2	4	4	0	1.000	4	28	3	1	0	19	4	5	1	7	0	0	0	133	0	7.07	1.77	4.00	0.25	21.1	5.3	0.73	.186	1.26	4.79
18	Christy Mathewson C. Mathewson	1.06	101.2	11	5	5	.500	11	48	10	4	0	76	12	22	1	10	1	0	3	391	1	4.25	0.89	4.80	0.09	12.3	2.6	0.85	.227	1.95	6.73
19	Norm Charlton N. Charlton	1.08	25.0	17	3	1	.750	0	22	0	0	2	13	3	4	1	9	1	5	1	96	1	7.92	3.24	2.44	0.36	22.9	9.4	0.88	.190	1.44	4.68
20	Blue Moon Odom B. Moon Odom	1.13	39.2	10	3	1	.750	4	27	1	1	0	22	5	7	0	13	0	1	0	150	2	6.13	2.95	2.08	0.00	18.0	8.7	0.88	.200	1.59	4.99
21	Kelvin Herrera K. Herrera	1.26	28.2	22	2	0	1.000	0	38	0	0	0	21	4	5	0	10	0	0	0	115	0	11.93	3.14	3.80	0.00	33.0	8.7	1.08	.313	1.57	6.59
22	Ian Anderson I. Anderson	1.26	35.2	8	4	0	1.000	8	40	0	0	0	20	5	5	1	17	2	0	0	145	1	10.09	4.29	2.35	0.25	27.6	11.7	1.04	.224	1.26	5.05
23	Babe Adams B. Adams	1.29	28.0	4	3	0	1.000	3	11	3	1	0	20	4	5	2	6	1	1	0	111	0	3.54	1.93	1.83	0.64	9.9	5.4	0.93	.198	1.61	6.43
24	Eddie Plank E. Plank	1.32	54.2	7	2	5	.286	6	32	6	0	0	36	8	11	0	11	4	1	1	215	1	5.27	1.81	2.91	0.00	14.9	5.1	0.86	.214	1.81	5.93
25	Clay Holmes C. Holmes	1.35	20.0	19	3	1	.750	0	20	0	0	0	11	3	3	1	7	2	3	0	76	0	9.00	3.15	2.86	0.45	26.3	9.2	0.90	.217	1.35	4.95